Number Systems Quiz

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Which of these is a prime number?

a) 15 b) 17 c) 21 d) 25

What is the prime factorization of 24?

a) 2³ × 3 b) 2² × 6 c) 4 × 6 d) 2⁴ × 3

Which number is irrational?

a) √4 b) √9 c) π d) 22/7

What is the LCM (Least Common Multiple) of 12 and 18?

a) 36 b) 6 c) 216 d) 72

What is the HCF (Highest Common Factor) of 24 and 36?

a) 12 b) 6 c) 72 d) 4

Which set does -5 belong to?

a) Natural numbers b) Whole numbers c) Integers d) Positive integers

Express 0.333... as a fraction:

a) 1/3 b) 3/10 c) 33/100 d) 1/9

Which of these is NOT a perfect square?

a) 49 b) 64 c) 72 d) 81

What is 2⁰?

a) 1 b) 0 c) 2 d) undefined

Which number is between √10 and √20?

a) 4 b) 3 c) 5 d) 2

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